When you use Pick Points to define your boundaries, AutoCAD analyzes all objects in the boundary set to derive the boundary definition. The boundary set is the set of objects that AutoCAD treats as eligible for analysis when defining boundaries from a specified point.
By default, the boundary set consists of all objects fully or partially visible in the current viewport. So, if 100 objects are currently visible, AutoCAD analyzes all 100 objects when you specify a point, regardless of the location of that point. Analysis of all of these objects can be time-consuming in a complex drawing. To hatch a small area of a complex drawing, you can define a custom boundary set. When you specify a point within the boundary set, AutoCAD does not analyze objects not included in the boundary set. Boundary sets are also useful for applying different hatch styles in different sections of a drawing.
Entries from November 2008 ↓
Defining Hatch Boundaries: Using Boundary Sets
November 30th, 2008 — AutoCAD Tutorials
Creating a Hatch Using Point Acquisition
November 29th, 2008 — AutoCAD Tutorials
You can define a hatch boundary by specifying points directly. For example, you may want to illustrate a pattern fill in a small section of a drawing, as shown in the following illustration. Continue reading →
Defining Hatch Boundaries: Removing Islands
November 28th, 2008 — AutoCAD Tutorials
When you use Pick Points to define your boundaries, you can remove any detected islands from your boundary definition. In the following procedure, you remove islands so that the part is hatched as illustrated. Continue reading →
Defining Hatch Boundaries: Using Island Detection Methods in AutoCAD
November 27th, 2008 — AutoCAD Tutorials
Island detection methods specify whether to include objects within the outermost boundary as boundary objects when you are using Pick Points. These internal objects are known as islands. By default, AutoCAD uses the Flood island detection method. The Flood method includes islands as boundary objects, as shown in the following illustration. How AutoCAD hatches the detected islands depends on the island detection style. The following illustration uses the Normal island detection style, meaning that islands remain unhatched and islands within islands are hatched. Continue reading →
Creating an Associative Hatch in AutoCAD
November 26th, 2008 — AutoCAD Tutorials
Hatched areas created with BHATCH are associative by default. You can remove hatch associativity at any time or you can change the default to create a nonassociative hatch. If you specify points to create an associative hatch, specify only one internal point per hatch block placement. Specifying more than one internal point can produce unexpected results when you edit the hatch boundary. Continue reading →
